Diversity of N2-fixing cyanobacteria in organic rice field during the cycle of rice crops

Dian Hendrayanti, Istatik Khoiriyah, Nurrahmi Fadilah, Andi Salamah

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

N2-fixing cyanobacteria are one of the microorganisms that hold a role in the cycles of nitrogen in a rice field. The existence of free-living N2-fixing cyanobacteria in paddy fields provides advantages for rice crop. The diversity of N2-fixing cyanobacteria has been extensively studied in the conventional rice field, while so far, there is no record of cyanobacterial occurrence at organic rice field. At present, implementation of organic rice-system has been increasing. Organic rice field is promoted as an alternative way of keeping the health of paddy field. From that point of view, investigation of N2-fixing cyanobacteria as a part of soil components is important. This study investigated the diversity of the filamentous N2-fixing cyanobacteria assemblage in the organic rice field during the cycle of rice crops (from Dec 2016 to July 2017; approximately two crop cycles). Soil samples were collected from four plots of 20 ha rice field. At each plot, sample soils from three random stations were taken using 3 cm diameter plastic cylinder and mixed to composite soil samples. The result showed that the number of species was low at the beginning and the harvest time of rice plantation (10 and 11, respectively). The number of species reached a peak at the panicle initiation (20 species). Three species were always found at all stages of rice crop's cycle: Nostoc punctiforme, Nostoc muscorum, and Anabaena fertilissima. Genus Nostoc was dominant followed by Anabaena, Calothrix, Cylindrospermum, Nodularia, Scytonema, Trichormus, and Stigonema.

Original languageEnglish
Title of host publicationInventing Prosperous Future through Biological Research and Tropical Biodiversity Management
Subtitle of host publicationProceedings of the 5th International Conference on Biological Science
EditorsZuliyati Rohmah, Lisna Hidayati, Tuty Arisuryanti, Maryani, Ganies Riza Aristya
PublisherAmerican Institute of Physics Inc.
ISBN (Print)9780735417182
DOIs
Publication statusPublished - 15 Aug 2018
Event5th International Conference on Biological Science: Inventing Prosperous Future through Biological Research and Tropical Biodiversity Management, ICBS 2017 - Yogyakarta, Indonesia
Duration: 15 Sep 201716 Sep 2017

Publication series

NameAIP Conference Proceedings
Volume2002
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference5th International Conference on Biological Science: Inventing Prosperous Future through Biological Research and Tropical Biodiversity Management, ICBS 2017
CountryIndonesia
CityYogyakarta
Period15/09/1716/09/17

Keywords

  • cyanobacteria
  • diversity
  • nitrogen
  • organic rice field

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